It's super easy to say "this was bad tactics because I personally was not converted" (and I'm very prone to feeling that way with irritating or intrusive advertisements), but I don't think it's actually a very useful way of thinking about things.
Shutdown a courthouse or government building or something instead, I guess is my point.
That's reasonable, but you also know that you can always come up with a justification for why this protest in particular was unacceptable.
Shutdown a courthouse? You're ruining people's weddings, you're preventing trials right before the statute of limitations expires, you're keeping people in jail for longer than they had to otherwise and then what if they commit suicide because jail is so bad?
People (justifiably) really hate being inconvenienced, but that's also kind of the point of this kind of protest.
common people are often short-sighted and self-destructive to their own progress